mirror of https://github.com/ecmwf/eccodes.git
82 lines
2.3 KiB
C
82 lines
2.3 KiB
C
/*
|
|
* (C) Copyright 2005- ECMWF.
|
|
*
|
|
* This software is licensed under the terms of the Apache Licence Version 2.0
|
|
* which can be obtained at http://www.apache.org/licenses/LICENSE-2.0.
|
|
*
|
|
* In applying this licence, ECMWF does not waive the privileges and immunities granted to it by
|
|
* virtue of its status as an intergovernmental organisation nor does it submit to any jurisdiction.
|
|
*/
|
|
|
|
/*
|
|
* C Implementation: bufr_missing
|
|
*
|
|
* Description: how to handle missing values in BUFR messages.
|
|
*/
|
|
|
|
#include "eccodes.h"
|
|
|
|
int main(int argc, char* argv[])
|
|
{
|
|
FILE* in = NULL;
|
|
|
|
/* message handle. Required in all the eccodes calls acting on a message.*/
|
|
codes_handle* h = NULL;
|
|
|
|
double doubleVal;
|
|
int err = 0;
|
|
int is_missing = 0;
|
|
int cnt = 0;
|
|
const char* infile = "../../data/bufr/syno_1.bufr";
|
|
|
|
in = fopen(infile, "rb");
|
|
if (!in) {
|
|
fprintf(stderr, "Error: unable to open file %s\n", infile);
|
|
return 1;
|
|
}
|
|
|
|
/* loop over the messages in the BUFR file */
|
|
while ((h = codes_handle_new_from_file(NULL, in, PRODUCT_BUFR, &err)) != NULL || err != CODES_SUCCESS) {
|
|
if (h == NULL) {
|
|
fprintf(stderr, "Error: unable to create handle for message %d\n", cnt);
|
|
cnt++;
|
|
continue;
|
|
}
|
|
|
|
printf("message: %d\n", cnt);
|
|
|
|
/* we need to instruct ecCodes to expand the descriptors
|
|
i.e. unpack the data values */
|
|
CODES_CHECK(codes_set_long(h, "unpack", 1), 0);
|
|
|
|
/* the value of this key is missing in the message*/
|
|
CODES_CHECK(codes_get_double(h, "relativeHumidity", &doubleVal), 0);
|
|
|
|
/* we will print "value missing" */
|
|
if (doubleVal == CODES_MISSING_DOUBLE) {
|
|
printf(" --> value missing\n");
|
|
}
|
|
else {
|
|
printf(" --> value present\n");
|
|
}
|
|
|
|
is_missing = codes_is_missing(h, "relativeHumidity", &err);
|
|
if (err || !is_missing) {
|
|
fprintf(stderr, "Error: relativeHumidity should be 'missing'\n");
|
|
return 1;
|
|
}
|
|
|
|
/* Set some other keys to be missing */
|
|
CODES_CHECK(codes_set_missing(h, "blockNumber"), 0);
|
|
CODES_CHECK(codes_set_missing(h, "#1#heightOfBaseOfCloud"), 0);
|
|
|
|
/* delete handle */
|
|
codes_handle_delete(h);
|
|
|
|
cnt++;
|
|
}
|
|
|
|
fclose(in);
|
|
return 0;
|
|
}
|